Kotlin v2.4.10-RC released!

NewsBot · 25 June 2026 12:24

Kotlin v2.4.10-RC has been released.

Changelog

Compiler

KT-86939 JVM: IllegalStateException “No value for annotation parameter” when using const val in nested Java annotation array argument

KT-83766 K2: Wrong sourcePsi is set for SymbolPsiLiteral in SLC for annotation arguments referencing a const val

KT-86728 Reified type inference: expected type not propagated into inline call inside lambda with elvis operator

Compose compiler

b/522127447 Fixed a bug that was making the stability of pre-cast types be used in certain skipping checks instead of the stability of post-cast types

Klibs

KT-86501 Native: IrTypeAliasSymbolImpl is already bound. Signature: kotlinx.datetime/Instant|null[0] on iosSimulatorArm64

Tools. CLI

KT-86930 Introduce kotlinr in the Kotlin distribution

Tools. Gradle. JS

KT-86057 kotlinUpgradeYarnLock skips lock file regeneration when kotlinNpmInstall is up-to-date, causing kotlinStoreYarnLock to fail

Tools. Gradle. Multiplatform

KT-87084 False positive warning for JS and Wasm compilations when CRI is enabled

Tools. Scripts

KT-87076 @file:CompilerOptions(“-jvm-target”, …) ignored in .main.kts scripts in Kotlin 2.4.0, falling back to JVM target 1.8

KT-86352 K2 scripting: FirResolvedTypeRef exception when resolving extension functions from imported scripts

Link: Release Kotlin 2.4.10-RC · JetBrains/kotlin · GitHub